She finished in first place with a score of 236.8 points.
Turkey’s Aysel Ozgan with 231.1 points and Indian Rubina Francis with 211.1 won the silver and bronze medals, respectively.
Taekwondo athlete Zahra Rahimi and throwers Parastoo Habibi and Zafar Zaker had won three silver medals for Iran earlier.
It was Javanmardi’s fifth medal in Paralympics.
She won two gold medals in Rio 2016 in the mixed 50m pistol SH1 and 10m air pistol SH1. Javanmardi also claimed a gold medal in the 10m air pistol SH1 in 2020 Tokyo.
Javanmardi had won a bronze medal in 2012 London in the 10m air pistol SH1.